Improvement in springs for seats



LA. snvauson.

Springs for Seats, &c.

Patented Feb. 23,1875.

X U Q U 0 \l a n z H fl f w a r w A Q n Q A n H f w H .a H m. f i 0 1 172 K INVENTOR V I I NES ES ATTORNEYS THE GRAPHIC CO.PHOTO.-LITN.39&4I PARK PLAGEJLY.

UNITED STATES PATENT OFFIc'E.

JOHN A. STEVENSON, OF BELVIDERE, NEW JERSEY, ASSIGNOR OF ONE- HALF HIS RIGHT TO JOHN J. KLINE, OF SAME PLACE.

IMPROVEMENT IN SPRINGS FOR SEATS, &c.

Specification forming part of Letters Patent No. 160,123, dated February 23, 1875; application filed October 10, 1874.

To all whom it may concern:

Be it known that 1, JOHN A. STEVENSON, of Belvidere, in the county of Warren and State of New Jersey, have invented a new and valuable Improvement in Spring-Seat for Vehicles; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawing is a representation of a plan view of my seat. Fig. 2 is a transverse sectional view of the same. Fig. 3 is a front view, and Fig. 4 is an end view, of the same.

This invention has relation to seats for vehicles; and it consists in combining in a seat the following elements, to wit: two braced frames tied together by diagonal braces; horizontal semi-elliptic springs at the front and rear sides and the ends of the frames, as will be understood from the following description.

In the annexed drawings, A A designate two open frames, which may be made of metal or other suitable material, and shaped to correspond to the place in a vehicle for which the seat is intended. Each frame is provided with crossed strips a, arranged to form squares, and" secured in their places, as shown in Fig. 1. B B designate two pairs of braces, which extend diagonally between the ends of the frames A A, and are crossed so that they prevent the top frame from lateral displacement, although they allow the top frame to rise and descend freely. O O and O (l designate semi elliptic springs, which are applied between the frames for adding to the ease and comfort of the seat. The rear one of the springs O has its extremities slotted, so that this spring can extend and contract readily. S S designate a number of spiral springs, the upper and lower ends of which are suitably secured to the crossed strips or of the two frames. The ends of the springs are tied together by means of crossed wires 1), which steady these springs and keep them in their places. Short wires, b, are also used for tying the springs to the frame A, as shown in Fig. 1.

To resist an undue extension of the springs S, I connect the upper and lower ends of each spring together by means of links I, which are shown in Fig. 2. These links are preferably shaped as shown in Figs. 2 and 5-that is to say, they are S-shaped.

What I claim as new, and desire to secure by Letters Patent, is

The combination of the two spring seat frames A A, tied together by interior oblique spring-braces B B, and exterior semi-elli1')tical spring-braces at the front and rear sides and at the ends of the frames, whereby all longitudinal and lateral movement of the seatframes is prevented.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

JOHN A. STEVENSON. Witnesses:

W. H. TRUMAN, S. J. RAULS. 

